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6K4P, 6K4P-EV

(6K4n, 6K4n-EB)

Analogue of EF93, 6F31

General

Pentode with long characteristic, used as an high frequency and intermediate frequency amplifier in automatic gain control circuits.
Envelope: glass miniature.
Mass 13 g.

Lead diagram

General characteristics:

Type 6K4n 6K4n-EB
Filament voltage, Volt 6.3 6.3
Anode voltage, Volt 250 250
2nd grid voltage, Volt 100 100
Resistance in cathode circuit, Ohm 68 68

Type 6K4n 6K4n-EB
Filament (heater) current, mA 270 to 330 275 to 325
Anode current, mA 7 to 13 7 to 13
2nd grid current, mA less than 5.5 less than 5.5
Reverse 1st grid current, mkA less than 1 less than 0.3
Dissipate cathode-heater current, mkA less than 20 less than 20
Mutual conductance, mA/V 3.5 to 5.3 3.5 to 5.3
Internal resistance, kOhm 850 450
Input resistance (at f=60 MHz), kOhm - 5
Vibration noise (at RA=2 kOhm), mV less than 400 less than 180
Inter electrode capacitance, pF:    
input 6 5.6 to 7.2
output 6.3 5.5 to 7.7
transfer less than 0.0045 less than 0.0035
cathode-heater 5.5 5.5
Operation time, h no less than 5000
90%
no less than 5000
98%

Limited operating values:

Type 6K4n 6K4n-EB
Filament voltage, V 5.7 to 6.9 6 to 6.6
Anode voltage, V 300 300
2nd grid voltage, V 125 125
Cathode heater voltage, V 90 90
Cathode current, mA 20 20
Anode dissipation, W 3 3
2nd grid dissipation, W 0.6 0.6
Resistance in 1st grid circuit, kOhm 500 500

Operating environmental conditions :

Type 6K4n 6K4n-EB
Acceleration of vibration loads, g 2.5 6
at the frequencies, Hz 50 5 to 600
Acceleration of multiple impacts, g 12 150
Acceleration of single impact, g - 150
Continuos acceleration, g - 100
Ambient temperature, 60 to +70 60 to +90
Relative humidity at up to 40C, % 98 98

Plate-grid and plate curves

Plate-grid curvesPlate curves